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Down-regulation of TGF-β RII expression is correlated with tumor growth and invasion in non-functioning pituitary

Ying-Hao Gu1, Yu-Gong Feng2

  • 1Department of Neurosurgery, The Affiliated Hospital Qingdao University, Qingdao, China; Department of Neurosurgery, The Central Hospital of Zibo, Zibo, China.

Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia
|October 17, 2017
PubMed

Insights

Low expression of Transforming Growth Factor-beta Receptor II (TGF-β RII) correlates with Non-Functioning Pituitary Adenoma (NFPA) invasion. Reduced TGF-β RII may drive NFPA development and invasion, suggesting its potential as a diagnostic biomarker.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Oncology

Background:

  • Transforming Growth Factor-beta (TGF-β) signaling is vital in cellular processes.
  • TGF-β signaling is implicated in the development and invasion of Non-Functioning Pituitary Adenomas (NFPAs).
  • The specific role of TGF-β receptors in NFPAs remains under-investigated.

Purpose of the Study:

  • To investigate the expression of TGF-β Receptor I (TGF-β RI) and TGF-β Receptor II (TGF-β RII) in NFPAs.
  • To explore the correlation between TGF-β receptor expression and NFPA invasiveness.
  • To assess the potential of TGF-β RII as a biomarker for invasive NFPAs.

Main Methods:

  • Quantitative real-time PCR (qRT-PCR) for mRNA analysis.
  • Western blot for protein expression analysis.
  • Immunohistochemistry for tissue-based expression profiling.

Main Results:

  • TGF-β RII mRNA and protein levels decreased progressively from normal pituitary tissue to non-invasive and then invasive NFPAs.
  • No significant difference in TGF-β RI mRNA or protein levels was observed between normal pituitary tissue and NFPAs.
  • Proliferating Cell Nuclear Antigen (PCNA) mRNA levels were elevated in invasive NFPAs and negatively correlated with TGF-β RII mRNA.

Conclusions:

  • Downregulation of TGF-β RII expression may contribute to the development and invasiveness of NFPAs.
  • TGF-β RII warrants further investigation as a potential biomarker for diagnosing invasive NFPAs.
Keywords:
InvasionNonfunctioning pituitary adenomaPCNATGF-β receptor

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